The 2016-17 Arctic cyclone season is a current event in the Arctic Ocean basin. It is the second season with named storms. The season officially began on November 1, 2016 and end on January 7, 2017. Storms are a part of this season if they form between June 1, 2016 and May 31, 2017. However, polar cyclone formation is possible at any time of year, although extremely rare during the summer months. This season started exceptionally early with the formation of Subpolar Storm Advent in late June, which later became an extremely rare offseason catastrophic polar cyclone. Three other cyclones formed before the official start of the season: Subpolar Depression Two, Polar Storm Bow and Polar Cyclone Carol.